leak tests: mark all trace2 tests as passing with SANITIZE=leak

Mark all tests that match "*trace2*" as passing when git is compiled
with SANITIZE=leak. They'll now be listed as running under the
"GIT_TEST_PASSING_SANITIZE_LEAK=true" test mode (the "linux-leaks" CI
target).

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t0210-trace2-normal.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 
 test_description='test trace2 facility (normal target)'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 # Turn off any inherited trace2 settings for this test.

t/t0211-trace2-perf.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 
 test_description='test trace2 facility (perf target)'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 # Turn off any inherited trace2 settings for this test.

t/t0212-trace2-event.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 
 test_description='test trace2 facility'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 # Turn off any inherited trace2 settings for this test.